4-TERT-BUTYLTOLUENE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
4-TERT-BUTYLTOLUENE is a cosmetic ingredient used in product formulation. Exercise caution due to limited available safety data.
4-tert-Butyltoluene (para-tertiary-butyltoluene) is an alkylbenzene derivative with a branched tert-butyl group attached to toluene. It is used as a fragrance ingredient contributing herbal and aromatic notes. There is limited published safety data for this compound in cosmetic contexts, and it has been flagged in some fragrance safety assessments for potential skin and respiratory tract irritation. It is not listed in EU Regulation 1223/2009 Annex II or III, meaning it is currently permitted but under regulatory review.
Skin benefits
- Provides aromatic, herbal fragrance notes
- Used as fragrance component
Known concerns
- Limited toxicological data for cosmetic safety assessment
- Respiratory tract irritant in aerosol formulations
- May cause skin irritation in sensitive individuals
- Air exposure may contribute to respiratory sensitization
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.